jengine.Rd
.jengine
obtains the current callback engine or starts it.
.jengine(start=FALSE, silent=FALSE)
if set to TRUE
then the callback engine is started
if it is not yet active
if set to TRUE
then NULL is returned if there is
no engine available. Otherwise an error is raised
Returns a Java object reference (jobjRef
) to the current Java
callback engine.
.jengine
can be used to detect whether the engine was started
or to start the engine.
Before any callbacks from Java into R can be performed, the Java
callback engine must be initialized, loading Java/R Interface
(JRI). If JRI was not started and start
is set to TRUE
then .jengine
will load necessary classes and start
it.
Note that JRI is an optional part of rJava and requires R shared library at the moment. By default rJava will continue with installation even if JRI cannot be built.
if (FALSE) {
.jengine(TRUE)
}